Welding electrode holder



Oct. 9, 1945. H. A. JACKSON WELDING ELECTRODE HOLDER Filed Feb. 18, 1944Hane/ ,4. Jackson Patented Oct. 9, 1945 UNITED STATES PATENT OFFICEWELDING ELECTRODE HOLDER Hone! A. Jackson, Detroit, Mich.

Application February 18, 1944, Serial No. 522,888

8 Claims. (01. 219-8) This invention relates to a. welding electrodeholder and more particularly to a holder for arc welding electrodes.

It is the object of this invention to produce a holder particularlyadapted for arc welding electrodes which is more eilicient, longer livedand cooler in operation than electrode holders heretoiore known.

This invention also contemplates a jaw type oi arc welding electrodeholder having a pivotal con nection between the jaws which will not beinjured or burned out by shorting or accidentally striking an are fromthe holder in the area of the pivot. This result is accomplished bypivoting the jaws together by a pivotal connection positioned within theside faces of the jaws and interiorally oi the jaws so that the jawsthemselves serve as a protection for the pivotal con nection.

In the drawing:

Fig. 1 is a side elevation partly in section showing my new type ofelectrode holder.

Figs. 2, 3, 4 and Bare sections along the lines 2--2, 3-3, 4-4 and 5-5of Fig. 1.

Fig. 6 is a fragmentary view partly in section taken along the line 68of Fig. 1.

Referring more particularly to the drawing, the electrode holdercomprises jaws I and 2 made from any suitable metal such as copper,aluminum, steel, or their alloys.

Jaw I is provided with a handle 3 of channel cross section and jaw 2 isprovided with a tubular handle 4. Handles 3 and 4 are each made ofelectrical and heat insulating materialcapable of withstanding highimpact, such as Bakelite or other heat resisting plastic or Bakelitemolded about reinforcing fabric such as canvas. Handle 3 is secured tojaw I by screws 5 and hand1e'4 is secured on jaw 2 by a tapered pint ofBakelite or other insulating material which is driven into and has atight fit in openings 1 in handle 2 and opening 8 in jaw 2. Current isconducted to jaw 2 by means of cable 9 which is fixed in the end of jaw2 by screws I0.

The outside faces I4 of jaws l and 2 opposite the electrode engagingfaces are each provided with a plurality of transverse grooves H whichserve to increase the heat radiating surface of the jaws and materiallyassist in air cooling of the same. Insulating covers I2 and I3 ofchannel section are also provided for jaws I and 2 respectively. Theseinsulating covers I2 and I3 can be made from Bakelite or any othersuitable electrical and heat insulating material capable of withstandinghigh impact. The covers I2 and I2 extend over and partially cover theside faces II of the jaws. A clearance or space II is provided betweenthe outside faces It 0! Jews I and 2 and the inside or bottom faces ofcovers 12 and II. Covers i2 and I2 are secured to their respective jawsby screws ii. The heads 0! all screws which secure the insulating coversto the jaws ilt into countersunk openings and are sealed over with aninsulating material. Covers i2 and ii are each provided with openings llwhich communicate with opposite ends of air space or clearance I8 andthereby permit air to circulate in and through openings i8 and space Itover the outer grooved faces I4 of the jaws for cooling the same.

A coil spring 22 is provided between laws l and 2 for closing the same.

. Jaws I and 2 are provided with bearing portions 21 and 22 whichcontact and rock or slide one relatively upon the other in the openingand closing of the holder jaws. The jaws are pivoted together by meansof a screw 23 which is screwed into a threaded opening 24 in jaw 2 andhas a hemispherical head 25 which is journaled in a hemispherical socket26 in jaw I. A clearance 21 is provided in jaw i about the stern ofscrew 22 to permit pivoting of jaw I on jaw 2.

To maintain the jaws in longitudinal alignment, jaw I is provided with atongue 28 which has a sliding lit in groove 2! in jaw 2. A smallclearance is provided between tongue 28 and the sides of groove 29.However, tongue 28 cooperates with groove 25 to keep jaws I and 2aligned one above the other and prevent jaw I from swivelllng aboutscrew 22 as an axis.

Screw 23 can be turned down so that bearing portions 2i and 22 have aneat sliding contact one upon'the other at all times or, if preferred,screw 23 can be screwed into jaw 2 so that there is a small clearancebetween bearing faces 2l and 22.

Jaw I can be readily disassembled irom jaw 2 by simply removing cover I2and thereupon tuming screw 23 out of jaw 2.

A welding electrode or rod can be readily inserted between jaws l and 2by pressing handle 2 toward handle 4 against compression spring 20 whichcauses jaw i to pivot about pivot 25, 26 while guided by tongue andgroove 28, 29 to thereby open the jaws forward or to the right of pivotscrew 23 so that an electrode can be inserted between the jaws andtightly gripped therebetween upon releasing handle 2.

Iclaim:

1. In a holder for welding electrodes, the combinstion comprising jawsadapted to grip an electrode therebetween, e pivotel connection betweensold lows in the form of a socket entending inwordlp iron: the outerface of. one of cold jaws end speoed longitudinally from the outer endoi.

jews can be swung'ebout sold pivotal connection to open the some forreception of an electrode, sold pivot member extending substantiallyper-=- pendiculur to the eerie of pivoting of said jaws.

2. In n holder for welding electrodes, the combination comprising jawsadapted to grip'en electrode therebetween, e pivotal connection betweenseid jaws in the form of o socket extending inwerdly from the outer faceof one of sold Jews essence alignment.

bin tion comprising jaws edepm to grip on electrode therebetween, ehemispherical socket in. end extending inwnrdly from, the outer face ofone of sold lows, on opening extending outwerdiy from the inner face ofsold low end communicntlng with sold socket, and c, hemisphericalbearing member having to stem portion peering through said opening endfixed to the other of sold jaws, sold beering member bein journelled incold socket for pivoting the sold jaws together, and means for keepingsaid jaws in longitudinal 6. In n holder for welding electrodes, thecombinution comprising lows adopted to grip an elec. trode therebetween,e hemispherical socket in,

I end extending inwardly from, the outer face of and spacedlongitudinally from the outer end of the jaw and positioned entirelywithin the side feces of the law, an opening extending outwardly fromthe inner face of sold jaw and communicating with said socket, o pivotmember. extending through said socket and openin and secured to theother jaw between the side faces of said other Jew end pivotolly bearingin the socket of the first mentioned jaw whereby the jaws can be swungabout said pivotal connection to open the some for reception of anelectrode, said pivot member extending substantially perpendicular tothe axis of pivoting 01 said jaws, and resilient means tending at alltimes to close sold jaws.

3. In a. holder for welding electrodes, the comblnntion comprising jawsadapted to rip an elec.

' trodetherebetween, a pivotal connection between said jaws in the formof a. concave socket extending inwardly from the outer face of one ofsold jaws, and spaced longitudinally, from'the electrodelreceiving endof said jaw, an opening extending outwardly from the inner face of saidjdw' end communicatin with said socket, and a,

convex bearing member journelled in the sold socket and having e.portion passing through said opening and fixed to the other jaw, thesaid pivotal connection being positioned within the side faces of saidjaws.

" 4. In a. holder for welding electrodes, the comhinatio'n comprisingjaws adapted to grip an electrode therebetween, a. pivotal connectionbetween one of sold jaws, an opening leading from the hemisphericalsocket to the inner face of sold Jew, e stud having 8. hemisphericelheed fixed to the other low with the stem of the stud passing throughthe said opening substantially perpendiculer to the axis of pivoting endthe hemispherical head of the stud bearing in seidsocket whereby thesold jaws ere pivotellv connected together', and guide means between thesold Jews in the form of a. tongue on one jaw projecting into s. groovein the other jow for keeping the some in longitudinal alignment, saidtongue end groove being in L ngitudinal alignment with said stud.

' '7. In a. holder for welding electrodes, the combinotion comprisingjaws adapted to grip an electrode therebetween, opposed convex bearingporticns on said jaws upon which one jaw pivots relative to the other,a. hemispherical socket in, and extending inwardly from, the outer faceof one of sold jaws, an opening between the socket and the inner face ofsaid law, a. threaded stud having a hemispherical heed screwed into athreaded opening in the other jaw with the head of said stud bearing inthe hemispherical socket and the stem passing through the openingbetween the socket end the inner face of the law, the said socket andstud being positioned between the side faces of said jaws. the said studextending substantially perpendicular to the axis about which the lawspivot.

8. Inc. holder for welding electrodes, the combination comprising jawsadapted to grip an electrode therebetween, opposed convex bearing porandextending inwardly from, the outer face of bearing member journalled inthe said socket and a portion passing through said opening' and fixed tothe other jaw, the said pivotal connection being positioned within theside faces of said jaws, and a tongue on one of said jaws alnd spacedlengthwise of the jaw from said hearing member and a. groove in theother of said jaws for receiving and guiding said tongue whereby thesaid jaws are maintained in longitudinal alignment.

5. In a holder for welding electrodes, the comone of said jaws, anopening between'the socket and the inner face of said jaw, a threadedstud having a. hemispherical, head screwed into a.

threaded opening in the other law with the head alignment.

7 HONEL A. JACKSON.

